FindByTitleKotlin.kt

val findByTitle = {query: String -> {collection: MutableList<Movie> ->
  val predicate = matches(query)
  filter(predicate)(collection)
}}

val filter = {predicate: (Movie) -> Boolean -> {collection: List<Movie> ->
  collection.filter(predicate)
}}

val matches = {query: String -> { movie: Movie -> 
   isInfixOf(query) (title(movie))
}}

val title = {movie: Movie -> movie.title}

val isInfixOf = {query: String -> {string: String -> 
   string.contains(query)
}}